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A file manipulation command that extracts some of the records from a file is called ?
A file manipulation command that extracts some of the records from a file is called SELECTcommand.
Key to represent relationship amongs tables is called ? A Key that represent the relationship between tables is called Foreign Key.
Benefits and Limitations od Data Models?
Define tuple variable Tuple variable is a type of variable whose domain is the set of all tuples.
Define the concept of generalization A generalization is relationship between specific kind of thing and general thing. It is also known as "is-a-kind-of" relationship. Inher
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
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What are the several kinds of the update operations on relations? Also explain the constraints on these update operation. Give instance in support of your answer. There are th
Explain in detail about Collaboration Diagrams Collaboration diagrams are interaction diagrams which emphasize structural organisation of an object that transmit and receive m
What is database Trigger? A database trigger is a PL/SQL block that can explained to automatically execute for insert, update, and delete statements against a table. The trigge
Explain the Strategy of Database Planning ?
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